Age and achievement.

Bibliographic Details
Main Author:	Lehman, Harvey Christian
Format:	Book
Language:	English
Published:	[Princeton] : Published for the American Philosophical Society by Princeton University Press, 1953.
Series:	Memoirs of the American Philosophical Society ; v. 33.
Subjects:	Creation (Literary, artistic, etc.)

Description
Physical Description:	xi, 358 pages : diagrams ; 25 cm.
Bibliography:	Bibliography: pages 333-341.